I haven't downvoted or flagged anything. I, personally, wouldn't downvote anything. But I would flag something. As far as downvoting, if I don't like something, I just move along. In a way, just happy someone is participating, even if the content isn't to my liking. Flagging is about rules violations, & the ability of the owner to keep the site up on it's server(s), w/o issues.
Just my 2cents.